TPM_CRB driver is the TPM support for ARM64. If it is built as module, TPM chip is registered after IMA init. tpm_pcr_read() in IMA driver would fail and display the following message even though eventually there is TPM chip on the system:
ima: No TPM chip found, activating TPM-bypass! (rc=-19) Fix IMA Kconfig to select TPM_CRB so TPM_CRB driver is built in kernel and initializes before IMA driver. Signed-off-by: Jiandi An <anjia...@codeaurora.org> --- security/integrity/ima/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/security/integrity/ima/Kconfig b/security/integrity/ima/Kconfig index 35ef693..6a8f677 100644 --- a/security/integrity/ima/Kconfig +++ b/security/integrity/ima/Kconfig @@ -10,6 +10,7 @@ config IMA select CRYPTO_HASH_INFO select TCG_TPM if HAS_IOMEM && !UML select TCG_TIS if TCG_TPM && X86 + select TCG_CRB if TCG_TPM && ACPI select TCG_IBMVTPM if TCG_TPM && PPC_PSERIES help The Trusted Computing Group(TCG) runtime Integrity -- Jiandi An Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.